- Entity: KbArticle(知识库文章), Announcement(公告), KpiDashboard(KPI看板VO)
- Mapper: KbArticleMapper, AnnouncementMapper (MyBatis-Plus)
- Service: KnowledgeBaseService(知识库CRUD+搜索+分类+点赞+热门),
           AnnouncementService(公告发布/编辑/按类型筛选/按范围推送/撤回),
           KpiService(KPI聚合计算:待处理量/时效/满意率/趋势/排行)
- Controller: CsSupportController (/api/revenue/cs/*)
- SQL DDL: V_cs_support.sql (cs_kb_article + cs_announcement 表+示例数据)
- Frontend: KnowledgeBaseView.vue(列表/卡片/Markdown编辑器),
            AnnouncementView.vue(类型标签/状态切换/时间范围),
            KpiDashboardView.vue(ECharts趋势图+饼图+排行)
- Unit Test: CsSupportServiceTest (知识库/公告/KPI三组测试)
- Router: 新增 /cs/knowledge, /cs/announcement, /cs/kpi 路由